Tools that get the numbers right, instantly.

Subhatools.com is a free toolkit built for India — GST and EMI calculators, PDF and image converters, and developer utilities. No signup, nothing to install, nothing to wait for.

GST Calculator — live preview
Amount₹1,000.00
GST (18%)₹180.00
Total₹1,180.00
Calculated in your browser — try it below
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Free online calculators for GST, EMI, percentages, age and more.
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GST Calculator EMI Calculator

Why people use Subhatools.com

Built for India first

GST and EMI calculators use Indian tax slabs and lending conventions out of the box — not generic templates translated from somewhere else.

Nothing to sign up for

Every tool works the moment you land on the page. No account, no email capture, no "sign in to see your result."

Works on any screen

Every calculator and converter is fully usable on a phone — most of our traffic isn't sitting at a desktop, so neither is our design.

Your files stay yours

Uploaded images and PDFs are processed and deleted — nothing is stored longer than it takes to give you the result.

Recently added

GST Calculator EMI Calculator Percentage Calculator Age Calculator PDF to JPG JPG to PDF PDF Compressor Image Compressor

Common questions

Yes — every tool on this site is free, with no usage limits, no account, and no hidden premium tier.

No. Every calculator and converter works immediately — there's nothing to sign up for anywhere on the site.

Uploaded images and PDFs are processed to produce your result and then deleted — they aren't kept or reused.